Flap detection for traps ? Does it work ?

[Stanley Hopcroft]

Dear Ladies and Gentlemen,

I am sorry for the noise about this matter.

The docco states

'Whenever a service check is performed that results in a hard state or a
soft recovery state, Nagios checks to see if the services has started or
stopped flapping. It does this by storing the results of the last 21
checks of the service in an array.'

In this case, the checks are passive so there are _no_ regular service
checks.

Therefore, the buffer of service check results will always contain equal
numbers of state transitions (between CRITICAL and OK) and thus will
_not_ contain an accurate record of the service history: this sort of
service will by definition be flapping (although hopefully with a high
periodicity)

It seems I will have to examine the flap detection threshold mechanism
more carefully.

Yours sincerely.

-- 
------------------------------------------------------------------------
Stanley Hopcroft
------------------------------------------------------------------------

'...No man is an island, entire of itself; every man is a piece of the
continent, a part of the main. If a clod be washed away by the sea,
Europe is the less, as well as if a promontory were, as well as if a
manor of thy friend's or of thine own were. Any man's death diminishes
me, because I am involved in mankind; and therefore never send to know
for whom the bell tolls; it tolls for thee...'

from Meditation 17, J Donne.


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